package com.ty.cloudpicture.manager;

import cn.hutool.core.io.FileUtil;
import com.qcloud.cos.COSClient;
import com.qcloud.cos.exception.CosClientException;
import com.qcloud.cos.model.COSObject;
import com.qcloud.cos.model.GetObjectRequest;
import com.qcloud.cos.model.PutObjectRequest;
import com.qcloud.cos.model.PutObjectResult;
import com.qcloud.cos.model.ciModel.persistence.PicOperations;
import com.ty.cloudpicture.config.CosClientConfig;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.io.File;
import java.util.ArrayList;
import java.util.List;

@Slf4j
@Component
public class CosManager {  
  
    @Resource
    private CosClientConfig cosClientConfig;
  
    @Resource  
    private COSClient cosClient;

    // ... 一些操作 COS 的方法
    //上传文件
    // 将本地文件上传到 COS
    public PutObjectResult putObject(String key, File file)
            throws CosClientException{
        PutObjectRequest putObjectRequest = new PutObjectRequest(cosClientConfig.getBucket(), key, file);
        return cosClient.putObject(putObjectRequest);
    }
    /**
     * 下载对象
     *
     * @param key 唯一键
     */
    public COSObject getObject(String key) {
        GetObjectRequest getObjectRequest = new GetObjectRequest(cosClientConfig.getBucket(), key);
        return cosClient.getObject(getObjectRequest);
    }

    /**
     * 上传对象（附带图片信息）
     *
     * @param key  唯一键
     * @param file 文件
     */
    public PutObjectResult putPictureObject(String key, File file) {
        PutObjectRequest putObjectRequest = new PutObjectRequest(cosClientConfig.getBucket(), key,
                file);
        // 对图片进行处理（获取基本信息也被视作为一种处理）
        PicOperations picOperations = new PicOperations();
        // 1 表示返回原图信息
        picOperations.setIsPicInfo(1);
        List<PicOperations.Rule> ruleArrayList = new ArrayList<>();
        String webpKey = FileUtil.mainName(key) + ".webp";
        PicOperations.Rule rule = new PicOperations.Rule();
        rule.setBucket(cosClientConfig.getBucket());
        rule.setRule("imageMogr2/format/webp");
        rule.setFileId(webpKey);
        ruleArrayList.add(rule);
        // 2. 缩略图处理，仅对 > 20 KB 的图片生成缩略图
        if (file.length() > 2 * 1024) {
            PicOperations.Rule thumbnailRule = new PicOperations.Rule();
            // 拼接缩略图的路径
            String thumbnailKey = FileUtil.mainName(key) + "_thumbnail." + FileUtil.getSuffix(key);
            thumbnailRule.setFileId(thumbnailKey);
            thumbnailRule.setBucket(cosClientConfig.getBucket());
            // 缩放规则 /thumbnail/<Width>x<Height>>（如果大于原图宽高，则不处理）
            thumbnailRule.setRule(String.format("imageMogr2/thumbnail/%sx%s>", 256, 256));
            ruleArrayList.add(thumbnailRule);
        }
        // 构造处理参数
        picOperations.setRules(ruleArrayList);
        putObjectRequest.setPicOperations(picOperations);
        return cosClient.putObject(putObjectRequest);
    }

    /**
     * 删除对象
     * @param key
     */
    public void deleteObject(String key) {
        try {
            cosClient.deleteObject(cosClientConfig.getBucket(), key);
            log.info("原始照片已从云服务删除:{}", key);
        } catch (CosClientException e) {
            throw new RuntimeException(e);
        }
    }
}
